Testing Einstein's weak equivalence principle with a 0.4-nanosecond giant pulse of the Crab pulsar
Testing Einstein's weak equivalence principle with a 0.4-nanosecond giant pulse of the Crab pulsar
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DOI：
10.1103/physrevd.94.101501
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发表时间：
2016-08
影响因子：
5
通讯作者：
Yuanpei Yang;Bing Zhang
中科院分区：
文献类型：
--
作者：
Yuanpei Yang;Bing Zhang
爱因斯坦的弱等效原理（EEP）可以通过不同频率的光子之间的到达时间延迟来测试。假设到达时间延迟完全是由银河系的引力势引起的，我们表明，具有能量之间的时间延迟的“纳米发射”巨型脉冲校正了所有已知的效应，例如来自蟹状脉冲星的$\Delta t<0.4~\rm{ns}$对EEP的偏差提出了新的上限，即$\Delta\gamma < (0.6-1.8)\times 10^{-15}$。这一结果提供了迄今为止对 EEP 最严格的约束，比之前基于快速无线电突发的结果提高了至少 2 到 3 个数量级。
Einstein's weak equivalence principle (EEP) can be tested through the arrival time delay between photons with different frequencies. Assuming that the arrival time delay is solely caused by the gravitational potential of the Milky Way, we show that a "nano-shot" giant pulse with a time delay between energies corrected for all known effects, e.g. $\Delta t<0.4~\rm{ns}$, from the Crab pulsar poses a new upper limit on the deviation from EEP, i.e. $\Delta\gamma < (0.6-1.8)\times 10^{-15}$. This result provides the hitherto most stringent constraint on the EEP, improving by at least 2 to 3 orders of magnitude from the previous results based on fast radio bursts.